The purpose of this paper is to provide understanding of the seasonal pattern of air leakage(infiltration)in Chinese vernacular buildings across China’s five climate regions.In achieving the set purpose,a grand exten...The purpose of this paper is to provide understanding of the seasonal pattern of air leakage(infiltration)in Chinese vernacular buildings across China’s five climate regions.In achieving the set purpose,a grand extensive literature survey was conducted and supported with data drawn from established Meteonorm V6.1 on sensible heat and psychrometric variables.Numerical computations for normalized and specific infiltration from stack effects followed the Gowri method in line with ASHRAE reference 2004.Solar energy admittance into building followed Bouger’s model form Angstrom properties.From the distribution of vernacular buildings across five climate regions of China,evidence from computational and numerical values showed symmetries in terms of minimums and maximums times of occurrence.Further,a reciprocal pattern exists between solar radiative admittance and region’s temperature profile.Knowing that Chinese vernacular building heritage extended to further Asia,this research became limited to only the Chinese region.It became difficult to report if the construction culture away from China has correlation with infiltration and energy admittance value.Earlier works on Chinese climate and vernacular dwellings reported a climate responsive dwelling designed by passive cooling strategy;a gap was closed by extending the previous work to specific infiltration pattern and energy admittance level.Chinese vernacular buildings by virtue of research outcomes are and should be adoptable to modern housing needs for cultural integration.展开更多
This study aimed to propose climatic zones in the Brazilian semiarid region using multivariate statistical techniques and to characterize these zones for energy efficiency applications in buildings.Principal component...This study aimed to propose climatic zones in the Brazilian semiarid region using multivariate statistical techniques and to characterize these zones for energy efficiency applications in buildings.Principal component analysis(PCA)was used to select the variables with the greatest practical relevance.From this selection,hierarchical cluster analysis(HCA)was used to spatially define climatically homogeneous zones.For each defined zone,the most feasible constructive thermal conditioning strategies were defined,and the thermal indexes of heat and degree-hours of cooling and heating were calculated.As result,PCA reduced the dimensionality of the initial database from 104 to 48 variables,among which the climatic and bioclimatic variables related to temperature stood out.From the HCA,three climatic zones were defined for the Brazilian semiarid region.For all zones,there was a high demand for constructive conditioning strategies,which have to be adopted in more than half of the total annual hours.The proposed zoning is adapted to the climatic aspects of the Brazilian semiarid and has significant potential for applications in construction planning in this region.Moreover,the methodology presented can be applied for establishing climatic zones in other regions,which can contribute to increasing the energy efficiency of buildings.展开更多
文摘The purpose of this paper is to provide understanding of the seasonal pattern of air leakage(infiltration)in Chinese vernacular buildings across China’s five climate regions.In achieving the set purpose,a grand extensive literature survey was conducted and supported with data drawn from established Meteonorm V6.1 on sensible heat and psychrometric variables.Numerical computations for normalized and specific infiltration from stack effects followed the Gowri method in line with ASHRAE reference 2004.Solar energy admittance into building followed Bouger’s model form Angstrom properties.From the distribution of vernacular buildings across five climate regions of China,evidence from computational and numerical values showed symmetries in terms of minimums and maximums times of occurrence.Further,a reciprocal pattern exists between solar radiative admittance and region’s temperature profile.Knowing that Chinese vernacular building heritage extended to further Asia,this research became limited to only the Chinese region.It became difficult to report if the construction culture away from China has correlation with infiltration and energy admittance value.Earlier works on Chinese climate and vernacular dwellings reported a climate responsive dwelling designed by passive cooling strategy;a gap was closed by extending the previous work to specific infiltration pattern and energy admittance level.Chinese vernacular buildings by virtue of research outcomes are and should be adoptable to modern housing needs for cultural integration.
基金This study was supported by the Coordination for the Improvement of Higher Education Personnel(Coordenac¸āo de Aperfeic¸oamento de Pessoal de Nível Superior-CAPES,grant number 001).
文摘This study aimed to propose climatic zones in the Brazilian semiarid region using multivariate statistical techniques and to characterize these zones for energy efficiency applications in buildings.Principal component analysis(PCA)was used to select the variables with the greatest practical relevance.From this selection,hierarchical cluster analysis(HCA)was used to spatially define climatically homogeneous zones.For each defined zone,the most feasible constructive thermal conditioning strategies were defined,and the thermal indexes of heat and degree-hours of cooling and heating were calculated.As result,PCA reduced the dimensionality of the initial database from 104 to 48 variables,among which the climatic and bioclimatic variables related to temperature stood out.From the HCA,three climatic zones were defined for the Brazilian semiarid region.For all zones,there was a high demand for constructive conditioning strategies,which have to be adopted in more than half of the total annual hours.The proposed zoning is adapted to the climatic aspects of the Brazilian semiarid and has significant potential for applications in construction planning in this region.Moreover,the methodology presented can be applied for establishing climatic zones in other regions,which can contribute to increasing the energy efficiency of buildings.
